diff --git a/opm/core/grid/cart_grid.c b/opm/core/grid/cart_grid.c
index 2847e1fd..c715aef3 100644
--- a/opm/core/grid/cart_grid.c
+++ b/opm/core/grid/cart_grid.c
@@ -118,7 +118,7 @@ create_grid_cart2d(int nx, int ny)
 /* --------------------------------------------------------------------- */
 
 struct UnstructuredGrid *
-create_grid_tensor2d(int nx, int ny, double x[], double y[])
+create_grid_tensor2d(int nx, int ny, const double *x, const double *y)
 {
     struct UnstructuredGrid *G;
 
@@ -136,9 +136,13 @@ create_grid_tensor2d(int nx, int ny, double x[], double y[])
 /* --------------------------------------------------------------------- */
 
 struct UnstructuredGrid *
-create_grid_tensor3d(int    nx,  int    ny , int    nz ,
-                      double x[], double y[], double z[],
-                      const double depthz[])
+create_grid_tensor3d(int           nx    ,
+                     int           ny    ,
+                     int           nz    ,
+                     const double *x     ,
+                     const double *y     ,
+                     const double *z     ,
+                     const double *depthz)
 {
     struct UnstructuredGrid *G;
 
diff --git a/opm/core/grid/cart_grid.h b/opm/core/grid/cart_grid.h
index 19fbad6c..2ab9c673 100644
--- a/opm/core/grid/cart_grid.h
+++ b/opm/core/grid/cart_grid.h
@@ -94,7 +94,7 @@ create_grid_cart3d(int nx, int ny, int nz);
  * Must be destroyed using function destroy_grid().
  */
 struct UnstructuredGrid *
-create_grid_hexa3d(int nx, int ny, int nz,
+create_grid_hexa3d(int    nx, int    ny, int    nz,
                    double dx, double dy, double dz);
 
 
@@ -122,8 +122,8 @@ create_grid_hexa3d(int nx, int ny, int nz,
  * Must be destroyed using function destroy_grid().
  */
 struct UnstructuredGrid *
-create_grid_tensor2d(int nx, int ny,
-                     double x[], double y[]);
+create_grid_tensor2d(int           nx, int           ny,
+                     const double *x , const double *y );
 
 
 /**
@@ -157,9 +157,13 @@ create_grid_tensor2d(int nx, int ny,
  * Must be destroyed using function destroy_grid().
  */
 struct UnstructuredGrid *
-create_grid_tensor3d(int nx, int ny, int nz,
-                     double x[], double y[], double z[],
-                     const double depthz[]);
+create_grid_tensor3d(int           nx    ,
+                     int           ny    ,
+                     int           nz    ,
+                     const double *x     ,
+                     const double *y     ,
+                     const double *z     ,
+                     const double *depthz);
 #ifdef __cplusplus
 }
 #endif
diff --git a/opm/core/grid/cpgpreprocess/preprocess.c b/opm/core/grid/cpgpreprocess/preprocess.c
index fe2b4a86..899ccfe7 100644
--- a/opm/core/grid/cpgpreprocess/preprocess.c
+++ b/opm/core/grid/cpgpreprocess/preprocess.c
@@ -872,7 +872,7 @@ void process_grdecl(const struct grdecl   *in,
 
     /* -----------------------------------------------------------------*/
     /* (re)allocate space for and compute coordinates of nodes that
-     * arise from intesecting cells (faults) */
+     * arise from intersecting cells (faults) */
     compute_intersection_coordinates(intersections, out);
 
     free (intersections);